49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// this will get a no-op Clone impl
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#[derive(Copy, Clone)]
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struct A {
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a: i32,
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b: i64
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}
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// this will get a deep Clone impl
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#[derive(Copy, Clone)]
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struct B<T> {
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a: i32,
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b: T
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}
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struct C; // not Copy or Clone
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#[derive(Clone)] struct D; // Clone but not Copy
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fn is_copy<T: Copy>(_: T) {}
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fn is_clone<T: Clone>(_: T) {}
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fn main() {
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// A can be copied and cloned
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is_copy(A { a: 1, b: 2 });
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is_clone(A { a: 1, b: 2 });
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// B<i32> can be copied and cloned
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is_copy(B { a: 1, b: 2 });
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is_clone(B { a: 1, b: 2 });
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// B<C> cannot be copied or cloned
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is_copy(B { a: 1, b: C }); //~ERROR Copy
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is_clone(B { a: 1, b: C }); //~ERROR Clone
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// B<D> can be cloned but not copied
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is_copy(B { a: 1, b: D }); //~ERROR Copy
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is_clone(B { a: 1, b: D });
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}
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